Continuity mistake: Towards the end of the movie when Liz is talking to Charlie on the couch, tears stream down her face. They cut to his daughter coming into the room, and when they cut back to Liz, her face is dry - no tears. (01:46:20 - 01:46:48)
Continuity mistake: At various points throughout the movie, the position of the lamp on the end table (to Charlie's left where he usually sits on the couch) changes, from the base being in the back corner, to mid-way along the chair's arm, to being centered along the rear edge, to near the middle of the table, etc. As the lamp's position changes, the other objects on the table also change. (00:02:15 - 00:04:21)
Suggested correction: "At various points throughout the movie" so he moved his lamp. If the shots aren't consecutive (screenshot, please) this is not a continuity error.